Engine temp won't come up...?

Hello all,
91 Silverado, 350, Short bed.
Early this spring the side of my radiator blew out and I replaced it (same #
of core radiator), the t-stat, cap and hoses. since then the thing takes a

little longer to heat up (to about 195). But, once the t-stat opens up, the
gauge drops to about 160 in a couple seconds and then run steady there. If
I idle for a while (a few minutes) it warms a little (maybe 170), but as
soon as I drive, it falls back to 160.
I burped the thing really well. I was on about a 40 degree slope and let
her run for almost an hour with the cap off. There was never a time that I
stuck my finger in the coolant and wasn't anything more than luke warm... I
also had the cooling system flushed at a shop, twice.
Now that the weather is turning colder, it is becoming more a nuisance. I
have changed the t-stat 3 times (Napa, AutoZone and Advance) with no change.
I am thinking that maybe my water pump is on the way out. My humble theory
is along the line that it is not broken, but maybe only pumping say 50% of
the coolant it should. This means the water is in the radiator twice as
long as normal and gets cooled off more. And as I recall, there was no
tremendous flow in the rad even though it did suck the water down during the
burping.
And so, I ask the free flowing fountain of knowledge in the group to flow
forth and flood this dry post with the liquid of insight. Thanks.

This makes little sense, if the water was in the radiator twice as
long as normal, guess where else it would be twice as long?

Go buy yourself a GM 195 degree thermostat and try to ignore
your factory gauge as it's not what I would term an accurate
gauge of where your temp is running. Try the factory thermostat
before you get too excited about other things.
Ian

Like the others who have responded have said, relax. If you're going by the
dash gauge, it's more of a "ballpark" reading than anything else. I drive
an 88' C1500 and it runs, according to the gauge, at around 150-160*.
However, accoring to the CTS resistance, she's running right around 195*.
It is likely that is was running too hot before and is currently running
just right.
Doc

<begin bullshit>
I'm a cardiovascular surgeon. "Doc"tor................
<end bullshit>
In all honesty, with my profession <epidemiologist> 90% of the people I meet
in both work and personal environments just assume I'm a medical doctor
because of the "ologist" at the end. This has earned me the nickname "Doc"
amongst my friends, more as a playful jab at the fact that I'm NOT a medical
doctor than anything else, he he he.
The quotation marks make sense now right?
Figured it would make a good usenet
handle............................................
Doc

I started in the field of experimental psychology, moved to chronic diseases
and am now working primarily with infectious diseases, although I am
currently dabbling in a few cancer studies as well. Yes, it is very
interesting, especially the infectious diseases which are lots of fun <given
that the agent is non-fatal> to track down in outbreak situations.
Remember the huge Hepatitis A outbreak in PA/OH last November, tied to green
onions at a Chi-Chi's restaraunt? It made national news so you might have
caught wind of it, biggest Hep A outbreak the US had ever seen (over 700
primary cases). Yours truly was the lead epidemiologist for
Ohio..............hell, you might have seen me on CNN! ;-)
Doc

.
.
====== snipped-for-privacy@nope.com (Doc)
writes:
.
I started in the field of experimental psychology, moved to chronic
diseases and am now working primarily with infectious diseases, although
I am currently dabbling in a few cancer studies as well.
Yes, it is very interesting, especially the infectious diseases which
are lots of fun <given that the agent is non-fatal> to track down in
outbreak situations.
Remember the huge Hepatitis A outbreak in PA/OH last November, tied to
green onions at a Chi-Chi's restaraunt? It made national news so you
might have caught wind of it, biggest Hep A outbreak the US had ever
seen (over 700 primary cases).
Yours truly was the lead epidemiologist for Ohio..............hell, you
might have seen me on CNN! ;-)
Doc
==========Hey Doc,
I know yer a busy dude.....
could yuh spare a sec to take a look at this
warty, pimply thing i got going on here on my
arse.....
ever seen a thang like this Doc......??
should i keep using this tobbaccer juice and
moss on it.....??
:)
~:~
marsh
~wonders if "ole doc" has access to any of
that "medicinal" marryjerwonna....strickly fer
medicinal purpose's of course~
========

Marsh, could ya post a link to a pic here on the ng so we can ALL take a
look? He he he he.

Well that all depends, If it's a hairy, warty, pimply thang, chew juice and
moss will just make it angry. Usually a haircut will make it happy and go
away............
If it's a non-hairy, warty pimply thang, I'm sorry, you only have 3 days to
live.

my factory gauge on my 92 K 1500 is about useless. new sending unit
and it still reads about 150 or so when the truck is really running
around 185. I've checked this with a scan tool. I would advise
getting an aftermarket gauge from autometer or some other mfg.
You might be able to use the plug in the RH cylinder head to access
for a 2nd temp gauge if you want to keep the factory one working, but
be careful about getting that pipe plug out. I screwed up mine and
eventually when the heads come off I'll fix it.
wrote:

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